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Finding the Fourth Proportional to 720,370.32, 994,107.24 and 398,102.80

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Solution

The fourth proportional to 720,370.32, 994,107.24 and 398,102.80 is: 549,379.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,370.32 : 994,107.24 = 398,102.80 : x
  2. Step 2: Convert to fraction form
    720,370.32/994,107.24 = 398,102.80/x
  3. Step 3: Cross multiply
    720,370.32x = 994,107.24 × 398,102.80
  4. Step 4: Simplify right side
    720,370.32x = 395,756,875,744.27
  5. Step 5: Solve for x
    x = 395,756,875,744.27/720,370.32
  6. Step 6: Final answer
    x = 549,379.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.